Singlespeed & Fixed Gear - IRD Defiant quesion \ confusion...

Description taken off of retro-gression:

• fits JIS square taper bottom brackets (110mm for most set-ups)

The "most set-ups" part has me scratching my head. I'm buying them to use on my 1st build. It'll be used on the Leader 722 I just bought from retro-gression. Should I be looking for a different size BB or am I lumped into the "most set-ups" category?

It has nothing at all to do with what frame you have.

As long as you'll be using a rear hub that will give you a 42mm (ish) chainline, you should use a 68mm English-threaded JIS square taper BB with 110mm spindle.

Thx. I should be good then since I'll be using a Formula hub or something rebranded.

Just picked up a Shimano UN55 to go along with my Defiants. Think I bought the right type but still second guessing myself. Please put me and ease experts.

If it's 68x110mm, you're good.

Yes it is. Gracias Scrod.

I was more confused about the tapering.

No prob.

When you install them, don't grease the spindle before you put on the arms. You should only grease a splined spindle.

Free knowledge. I love it.

I was more confused about the tapering.

Oh right on. Yeah, the UN55 has a JIS taper so you're all set.

It has nothing at all to do with what frame you have.

As long as you'll be using a rear hub that will give you a 42mm (ish) chainline, you should use a 68mm English-threaded JIS square taper BB with 110mm spindle.

How does one figure out what chainline you'll have based on your hubs?


No prob.

When you install them, don't grease the spindle before you put on the arms. You should only grease a splined spindle.

Oh crap, this is a TIL for me. I definitely greased mine lol. D'oh.

How does one figure out what chainline you'll have based on your hubs?

Because of variances from one brand of cog to another, there is no actual standard - which is why I said 42(ish).


Oh crap, this is a TIL for me. I definitely greased mine lol. D'oh.

Clean it off. Greasing a square-taper makes over-torquing the crank arms much easier, which can cause the interface to slide too far onto the spindle and become misshapen.

What is the proper torque?

I'm fairly certain crank arm bolts on Shimano BBs should be somewhere between 310-390 in-lb. Did your cranks or BB come with a tech sheet?

The BB did. I'll check it when I get home. All these questions should go into the Ask Scrod post.

proper torque force for the part is useless without a torquimeter amiright?

My mind is a torquemeter.

My mind is a torquemeter.

http://30.media.tumblr.com/tumblr_lp41uuBtP51qkc8zfo1_500.gif

http://cdn.lolhappens.com/wp-content/uploads/2011/11/MakeupFail.jpg

Torque = 485 - 608 in lbs

I used this BB with my new Def crankset:

http://www.interlocracing.com/bbs.html

It came with a nice tech sheet with all the numbers you need to know...

And the price was right, too. That's a nice looking crankset.

Torque = 485 - 608 in lbs

That seems a bit high. I use 33 ft-lbs (400 in-lbs) on all my square taper cranks.

My mind is a torquemeter.

More like sub-forum Torquemada:

http://www.texemarrs.com/images/torquemada1.jpg

The grimace is similar, but the hair's a bit off. Scrod, you gonna rock the tonsure any time soon?

hahaha

I always followed greasing square tapers. Jobst Brandt is in favor of it and his reasons seems to make more sense than the reasons used by those in favor of dry installations.

http://sheldonbrown.com/brandt/installing-cranks.html

I always followed greasing square tapers. Jobst Brandt is in favor of it and his reasons seems to make more sense than the reasons used by those in favor of dry installations.

http://sheldonbrown.com/brandt/installing-cranks.html

http://thelipstickchronicles.typepad.com/.a/6a00d8341c57f753ef0134834f8ee5970c-800wi

For the record, I'm not very fond of Brandt's book The Bicycle Wheel either. Big deal.

Was taught dry at UBI. Know a guy who cracked Topline cranks at the crank taper hole who swore by greasing spindle.

40 Nm, or to crank mfg spec, no grease.

For the record, I'm not very fond of Brandt's book The Bicycle Wheel either. Big deal.
I don't think anybody is.

I don't think anybody is.


For the record, I'm not very fond of Brandt's book The Bicycle Wheel either. Big deal.

Just out of curiousity, what dont you like about that book? I used this book to build my first wheelset since that was what my LBS recommended. So I used his book (plus sheldon brown's website) Crap. :(

The basis of my bicycle knowledge comes from Sheldon Brown, Leonard Zinn, and Brandt's articles. Have I been reading the wrong people?

(Note: I am not being sarcastic. I am seriously asking if I have been studying from the wrong people)

There isn't anything wrong with the book per se. It is just that there are only really like 4 pages of it that are actually useful. Does anybody really need outdated calculations of spoke strength?

It is awesome that somebody finally decided to apply some science to the problem of wheel building but it doesn't really help most people build wheels.

There isn't anything wrong with the book per se. It is just that there are only really like 4 pages of it that are actually useful. Does anybody really need outdated calculations of spoke strength?

It is awesome that somebody finally decided to apply some science to the problem of wheel building but it doesn't really help most people build wheels.

Thanks goodness. Hopefully my wheel wont explode under me.

I actually liked all the science-y stuff. Since I never built a wheel before, it was nice to see the theory behind why things were done the way they were done.

It is awesome that somebody finally decided to apply some science to the problem of wheel building but it doesn't really help most people build wheels.

Some people do better with the techy stuff; some people do better with an artsy-fartsy approach. To the latter, Brandt is anathema -- suggest Gerd Schraner's The Art of Wheelbuilding instead.